<template>
    <div>
      <!--      面包谢导航区域-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/rights' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>
      </el-breadcrumb>
      <el-card>
        <el-alert title="注意：只允许为第三级参数设置" type="warning" show-icon :closable="false">
        </el-alert>
        <el-row class="cat_opt">
          <el-col>
            <span>选择商品分类：</span>
            <el-cascader
              expand-trigger="hover"
              :options="catelist"
              :props="cateProps"
              v-model="selectCateKeys"
              @change="handleChange">
            </el-cascader>
          </el-col>
        </el-row>
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
<!--          添加动态参数面板-->
          <el-tab-pane label="动态参数" name="many">
            <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addDialogVisible=true">添加参数</el-button>
            <el-table :data="manyTableData" border stripe>
<!--               展开行-->
              <el-table-column type="expand">
<!--                循环渲染tag标签-->
                <template slot-scope="scope">
                  <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" style="margin-left: 15px" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                  <!--                输入文本框-->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!--                添加的按钮-->
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)" >+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index" label="#"></el-table-column>
              <el-table-column prop="attr_name" label="参数名称"></el-table-column>
              <el-table-column  label="操作">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
          <!--          静态属性参数面板-->
          <el-tab-pane label="静态属性" name="only">
            <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addDialogVisible=true">添加属性</el-button>
            <el-table :data="onlyTableData" border stripe>
              <!--               展开行-->
              <el-table-column type="expand">
                <!--                循环渲染tag标签-->
                <template slot-scope="scope">
                  <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" style="margin-left: 15px" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                  <!--                输入文本框-->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!--                添加的按钮-->
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)" >+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index" label="#"></el-table-column>
              <el-table-column prop="attr_name" label="属性名称"></el-table-column>
              <el-table-column  label="操作">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
        </el-tabs>
      </el-card>
<!--      添加参数-->
      <el-dialog
        :title="titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
        >
        <el-form :rules="addFormRules" :model="addForm" ref="addFormRef">
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
      </el-dialog>

<!--      修改参数对话框-->
      <el-dialog
        title="修改"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <el-form :rules="editFormRules" :model="editForm" ref="editFormRef">
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  name: 'Params',
  data() {
    return {
      // 商品分类的列表
      catelist: [],
      // 级联选择框配置的对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定到的数组
      selectCateKeys: [],
      // 被激活的页签名称
      activeName: 'many',
      // 动态参数数据
      manyTableData: [],
      // 静态参数数据
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [
          {required: true, message: '请输入活动', trigger: 'blur'}
        ]
      },
      editDialogVisible: false,
      editForm: {
        attr_name: ''
      },
      editFormRules: {
        attr_name: [
          {required: true, message: '请输入活动', trigger: 'blur'}
        ]
      }
    }
  },
  methods: {
    async getCateList () {
      const {data: res} = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.catelist = res.data
    },
    // 级联选择框选中项变化，会触发这个函数
    handleChange () {
      this.getParamsDate()
    },
    // tag页签点击事件处理函数
    handleTabClick() {
      this.getParamsDate()
    },
    async getParamsDate () {
      if (this.selectCateKeys.length !== 3) {
        this.selectCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return 0
      }
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: this.activeName}})
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      console.log(res.data)
      if (res.meta.status !== 200) return this.$message.error('获取参数失败')
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return 0
        const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加参数成功')
        this.addDialogVisible = false
        this.getParamsDate()
      })
    },
    // eslint-disable-next-line camelcase
    async showEditDialog (attr_id) {
      // eslint-disable-next-line camelcase
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {
        params: {attr_sel: this.activeName}
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return 0
        const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {attr_name: this.editForm.attr_name, attr_sel: this.activeName}
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改参数成功')
        this.getParamsDate()
        this.editDialogVisible = false
      })
    },
    // eslint-disable-next-line camelcase
    async removeParams (attr_id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // eslint-disable-next-line camelcase
      const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      this.getParamsDate()
    },
    // 文本框失去焦点或enter
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return 0
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    async saveAttrVals (row) {
      const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) return this.$message.error('添加失败')
      this.$message.success('添加成功')
    },
    showInput(row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      // $nextTick方法作用 ，就当页面元素被重渲染，才能执行回调函数代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    handleClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    isBtnDisable() {
      if (this.selectCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectCateKeys.length === 3) {
        return this.selectCateKeys[2]
      }
      return null
    },
    titleText() {
      if (this.activeName === 'many') {
        return '添加动态参数'
      }
      return '添加静态属性'
    }
  },
  created () {
    this.getCateList()
  }
}
</script>

<style scoped>
.cat_opt{
  margin-top: 15px;
}
  .input-new-tag{
    width: 120px;
  }
</style>
